Data / Mines / Wyoming / Converse County
Mines in Converse County, Wyoming: 13 open mines
MSHA lists 13 open mines in Converse County, Wyoming, run by 9 operators and employing 477 people. Since January 1, 2022 its inspectors issued 192 citations and orders there with $60,955 in proposed penalties, and operators reported 12 injury or illness cases. The operators with the most open mines are Croell, Inc.; 383 Construction LLC; Black Hills Lignite a Limited Liability Co. Data from MSHA, November 6, 2026.
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- Open mines
- 13
- Operators
- 9
- Employees
- 477
- Active
- 6
- Intermittent
- 4
- Temporarily Idled
- 3
- Citations and orders since January 1, 2022
- 192
- Significant and substantial
- 24 (12.5%)
- Closure orders
- 1
- High negligence or reckless
- 17
- Proposed penalties
- $60,955
- Amount paid so far
- $44,460
- Inspections
- 97
- Inspector hours on site
- 1,738
- Citations per inspection
- 1.98 (all mines 2.30)
- Accident reports
- 13
- Injury and illness cases
- 12
- Fatalities
- 0
- Latest MSHA record
- October 27, 2026
Operators with the most open mines in Converse County, Wyoming
Ranked by open mines, then by citations. Sole proprietors and individuals are not listed.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Croell, Inc. | 3 | 10 | 14 | $2,244 | 1 |
| 383 Construction LLC | 2 | 3 | 19 | $3,011 | 0 |
| Black Hills Lignite a Limited Liability Co | 2 | 11 | 19 | $13,472 | 0 |
| Navajo Transitional Energy Company, LLC | 1 | 430 | 78 | $23,377 | 7 |
| Russell Construction Company | 1 | 3 | 20 | $2,921 | 0 |
| Powder River Proppants, LLC | 1 | 10 | 19 | $11,289 | 4 |
| B&M Sand and Gravel | 1 | 3 | 17 | $3,492 | 0 |
| Wyoming Earthmoving Corporation | 1 | 4 | 6 | $1,149 | 0 |
| Stone Royale LLC | 1 | 3 | 0 | $0 | 0 |
Operators with the most citations in Converse County, Wyoming
Citations and orders issued since January 1, 2022 at their open mines here.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Navajo Transitional Energy Company, LLC | 1 | 430 | 78 | $23,377 | 7 |
| Russell Construction Company | 1 | 3 | 20 | $2,921 | 0 |
| 383 Construction LLC | 2 | 3 | 19 | $3,011 | 0 |
| Black Hills Lignite a Limited Liability Co | 2 | 11 | 19 | $13,472 | 0 |
| Powder River Proppants, LLC | 1 | 10 | 19 | $11,289 | 4 |
| B&M Sand and Gravel | 1 | 3 | 17 | $3,492 | 0 |
| Croell, Inc. | 3 | 10 | 14 | $2,244 | 1 |
| Wyoming Earthmoving Corporation | 1 | 4 | 6 | $1,149 | 0 |
| Stone Royale LLC | 1 | 3 | 0 | $0 | 0 |
Mines with the most citations
Open mines, ranked by citations and orders since January 1, 2022.
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Antelope Coal Mine | Navajo Transitional Energy Company, LLC | Converse County, WY | Coal (bituminous) | 430 | 78 |
| Douglas Quarry | Russell Construction Company | Converse County, WY | Construction sand and gravel | 3 | 20 |
| Glenrock Mine 01 | Powder River Proppants, LLC | Converse County, WY | Construction sand and gravel | 10 | 19 |
| B&M Sand and Gravel, Inc. | B&M Sand and Gravel | Converse County, WY | Construction sand and gravel | 3 | 17 |
| Glenrock Mill | Black Hills Lignite a Limited Liability Co | Converse County, WY | Leonardite | 6 | 13 |
| Crusher #1 | 383 Construction LLC | Converse County, WY | Construction sand and gravel | 2 | 12 |
| Douglas Wash Plant | Croell, Inc. | Converse County, WY | Construction sand and gravel | 3 | 11 |
| Screen #1 | 383 Construction LLC | Converse County, WY | Construction sand and gravel | 1 | 7 |
| Glenrock Mine | Black Hills Lignite a Limited Liability Co | Converse County, WY | Leonardite | 5 | 6 |
| Jaw Crusher JS3750 | Wyoming Earthmoving Corporation | Converse County, WY | Construction sand and gravel | 4 | 6 |
| West Crusher #4 | Croell, Inc. | Converse County, WY | Crushed, broken limestone | 4 | 2 |
| Dirt Crew #2 | Croell, Inc. | Converse County, WY | Construction sand and gravel | 3 | 1 |
| Q3 | Stone Royale LLC | Converse County, WY | Construction sand and gravel | 3 | 0 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Construction sand and gravel | 9 | 69.2% |
| Leonardite | 2 | 15.4% |
| Crushed, broken limestone | 1 | 7.7% |
| Coal (bituminous) | 1 | 7.7% |
Citations and injury cases by year
Calendar years since 2022; 2026 runs to the date of the MSHA files.
| Year | Citations and orders | Significant and substantial | Proposed penalties | Injury and illness cases |
|---|---|---|---|---|
| 2022 | 37 | 5 | $22,605 | 2 |
| 2023 | 27 | 1 | $4,598 | 2 |
| 2024 | 40 | 3 | $7,553 | 0 |
| 2025 | 53 | 9 | $19,426 | 5 |
| 2026 | 35 | 6 | $6,773 | 3 |
Standards cited most at mines in Converse County, Wyoming
Sections of Title 30 of the Code of Federal Regulations named on the citations, with the part each belongs to.
| Standard | What the part covers | Citations |
|---|---|---|
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 13 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 9 |
| 30 CFR 77.1110 | Surface coal mines, safety | 9 |
| 30 CFR 77.1605 | Surface coal mines, safety | 9 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 8 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 6 |
| 30 CFR 77.1104 | Surface coal mines, safety | 6 |
| 30 CFR 77.404 | Surface coal mines, safety | 5 |
| 30 CFR 77.1607 | Surface coal mines, safety | 5 |
| 30 CFR 77.502 | Surface coal mines, safety | 5 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 4 |
Injury and illness cases at mines in Converse County, Wyoming
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 8 |
| No lost time, or an occupational illness | 4 |
What the accident reports at mines in Converse County, Wyoming describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Machinery | 5 |
| Slip or fall of person | 2 |
| Powered haulage | 1 |
| Handtools (nonpowered) | 1 |
| Handling of materials | 1 |
| Fire | 1 |
| Stepping or kneeling on object | 1 |
| Hoisting | 1 |
Equipment named in accident reports at mines in Converse County, Wyoming
| Equipment | Reports |
|---|---|
| Hand tools (powered) | 3 |
| Ore haulage trucks - off highway trucks | 1 |
| Hand tools (not powered) | 1 |
| Welding machine | 1 |
| Elevator | 1 |
| Shovel | 1 |
Updated November 6, 2026. Read from US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets. US government work, public domain. Counts come from the MSHA files published on November 6, 2026. An open mine is one MSHA lists as Active, Intermittent, New Mine, Temporarily Idled or NonProducing; 13,673 were open that day. Citations, penalties, inspections and accident reports run from January 1, 2022. A citation is an inspector's allegation and an operator can contest it; the penalty is the amount MSHA first proposed, before any contest or settlement. An operator is the legal entity MSHA assesses, and a parent company is its controller. Mines run by sole proprietors or by individuals are counted in every total and are not named. This page uses MSHA data and is not endorsed or certified by MSHA. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.